See your eye doctor: For your symptoms of floaters you should see your eye doctor right away to see if it's the sign of a serious problem. As for your other symptoms, they should warrant some further testing.
I believe that it is correct to say that RNA is not replicated, but reproduced. DNA, what I know currently, is the only one that replicates itself.   Plus, to my knowledge, you don't need to copy a RNA strand.
RNA synthesis (=Transcription) is the process of copying information in DNA sequences into RNA sequences. How is transcription different from replication of DNA? DNA replication serves to copy all the genetic material of the cell and occurs before a cell divides.